Java SE Base API - Basic

This exam contains the obvious things you need to start writing simple programs. Basic usage of the following classes and packages.

	Released	Beta	Frozen
Wrappers for primitive types Create and use the wrapper classes: `java.lang.Boolean` `java.lang.Byte` `java.lang.Character` `java.lang.Double` `java.lang.Float` `java.lang.Integer` `java.lang.Long` `java.lang.Short` Not covered: Autoboxing / Unboxing
Construction 1 question Discuss that the wrappers are immutable and the consequences of that. Develop code that demonstrates how to get an instance of a wrapper.	19	72	72	Add a question Beta questions
Convenience Methods 1 question Create code that shows the conversion from a wrapper to a primitive and back to a wrapper. Write code that gets a primitive value from a wrapper instance. Write code that gets a wrapper instance from a primitive value.	14	60	33	Add a question Beta questions
Dates and Calendar Work with the following classes to handle dates and time: `java.util.Date` `java.sql.Time` `java.util.Calendar` `java.util.GregorianCalendar` Not covered: `TimeZone`, `DateFormat` (these questions are in the Format section), all the special things about the `GregorianCalendar`.
Date 1 question Recognize the deprecated constructors and methods of `Date` and know which methods should be used instead. Create code that uses a `Date`. Write code that uses `System.currentTimeMillis()` to get the current time.	15	3	41	Add a question Beta questions
Calendar 1 question Develop code that uses the different `add()` and `set()` methods to manipulate calendar fields.	18	3	39	Add a question Beta questions
Format Convert date, decimal, and integer to and from a String using the following classes: java.text.Format java.text.DateFormat java.text.SimpleDateFormat java.text.NumberFormat java.text.DecimalFormat Not covered: `java.util.Formatter`, thread safe handling
DateFormat 1 question Show the basic usage of the `SimpleDateFormat`. Develop code that uses `SimpleDateFormat` to parse and format dates.	13	14	44	Add a question Beta questions
NumberFormat 1 question Use the `DecimalFormat` to format numbers. Create code that uses `DecimalFormat` to format numbers in different notations (scientific, fixed-point, integer,...). Create patterns and use them to format numbers.	12	3	24	Add a question Beta questions
Math 1 question The basic usage of the `java.lang.Math` class. Create code that uses the `min()` and `max()` methods. Use the `random()` method. Discuss and use the `round()`, `ceil()` and `floor()` methods. Not covered: Methods and/or values of `sin, cos, tan, log, ...`	24	75	37	Add a question Beta questions
String Manipulation Discuss the basic usage of the following classes: `java.lang.String` `java.lang.StringBuffer` `java.util.StringTokenizer` A good introduction to the String Literal Pool (or sometimes called String Constant Pool) can be found here. Not covered: `StringBuilder`, `Scanner`, `printf()`
String 2 questions Discuss that Strings are immutable and the implications of that. Write code that uses these String methods: `equalsIgnoreCase` and `equals` `indexOf` `length` `toLowerCase` and `toUpperCase` `trim`	28	302	64	Add a question Beta questions
StringBuffer 2 questions Discuss the appropriate use of `StringBuffer` and know that it is synchronized. Create code that uses the different `StringBuffer` constructors (default constructor, with capacity, with String). Write code using the `StringBuffer` methods (`append()`, `insert()`). Not covered: Special `StringBuffer` methods like `codePointXXX()`, `appendCodePoint()`, `lastIndexOf()`, `ensureCapacity()`, ...	47	65	44	Add a question Beta questions
StringTokenizer 2 questions Create code that uses the different `StringTokenizer` constructors. Develop code that tokenizes a string and makes use of the `StringTokenizer` methods (`countTokens()`, `hasMoreElements()`, `hasMoreTokens()`, `nextElement()`, `nextToken()`).	25	0	35	Add a question Beta questions
Regular Expression 1 question The very basic use of Regular Expressions is required for this category. Identify the special characters used by Regular Expressions. Write code that matches a file extension (e.g. txt)	12	6	50	Add a question Beta questions